Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e2622c55ec2447f…

MALICIOUS

PDF

70.4 KB Created: 2021-09-04 18:19:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 16dbec1a4b9c6510c8fdb7d8e68cd178 SHA-1: f8ac612904021d185eb3cbf7b77ec555d60d48c9 SHA-256: 0e2622c55ec2447f289a2a8e5f6ae4f04a83cf3ee8e9d51c824f5771155b7e61
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of links, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e0cc91d83f---54963591167.pdf In PDF document text
    • http://hytechplus.com/userfiles/file/jibumikosuzujewemirewono.pdfIn PDF document text
    • http://khachsansapa.vn/webroot/img/files/fowipuzibajevonadexa.pdfIn PDF document text
    • http://e-park.es/img/uploads/files/gobeji.pdfIn PDF document text
    • https://transport-vehicules.fr/userfiles/file/tumilep.pdfIn PDF document text
    • http://zussobrance.sk/grafika/dokumenty/veruv.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d631055564---lagawedibazitov.pdfIn PDF document text
    • http://zovsh.com/Uploadfiles/files/49248868533.pdfIn PDF document text
    • http://chnli.tw/CKEdit/upload/files/53798302532.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/24c88a803cb1826acbd230865be62f46/talijovimidu.pdfIn PDF document text
    • https://vieclamxaydung24h.com/upload/files/pafezimapewuv.pdfIn PDF document text
    • http://kccmaul.com/files/files/72881899430.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8c1d40eefef75026b164ab34193de5c1/64907592106.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097ec582d3df---suvisamixadukapuw.pdfIn PDF document text
    • http://blackhorsesc.pl/userfiles/file/wuzumorimabavobirigeno.pdfIn PDF document text
    • http://globalquestconsulting.com/userfiles/files/fekixomivofagudumalar.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606c68c1762c3---xijopifabebizudumujalewux.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b37d73b15fb---xikikexu.pdfIn PDF document text
    • http://michalpavlicek.com/uploaded/file/xifezadovifibitibijimivaf.pdfIn PDF document text
    • http://www.malagatour.es/ckfinder/userfiles/files/41043405235.pdfIn PDF document text
    • http://neodermclinic.com/file_media/file_image/file/zebuzusosonibugabujefo.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb9e6c8e3f---japubanigagemudupatanav.pdfIn PDF document text
    • http://hocikto.info/userfiles/file/kubugabekekoxapogenereket.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=fractional+parts+of+whole+numbers+worksheetsPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b4ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cd01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD01 11140 bytes
SHA-256: 84ca3787af92110afe415aaec5da717937ed7e76cb51db42e349a208506b4481
font_02_sfnt_off0000e6a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A9 14808 bytes
SHA-256: 8e7b7d7dd0939b1735161f110b20026246a62122adbdbf4c1402d63a4786639e

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